jersey 过滤器

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>restDemo</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  
     <servlet>
	  <servlet-name>Jersey REST Service</servlet-name>
	<servlet-class>
	  com.sun.jersey.spi.container.servlet.ServletContainer
	</servlet-class>
	  <init-param>
	    <param-name>com.sun.jersey.spi.container.ContainerRequestFilters</param-name>  
          <param-value>com.mtour.rest.resources.requestFilter</param-value> 
	  </init-param>
	  <load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
	  <servlet-name>Jersey REST Service</servlet-name>
	  <url-pattern>/rest/*</url-pattern>
	</servlet-mapping>
  
</web-app>

package com.mtour.rest.resources;

import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;

import com.sun.jersey.spi.container.ContainerRequest;
import com.sun.jersey.spi.container.ContainerRequestFilter;

public class requestFilter implements ContainerRequestFilter{

	@Override
	public ContainerRequest filter(ContainerRequest arg0) {
		// TODO Auto-generated method stub
		
		throw new WebApplicationException(
                Response.status(Status.INTERNAL_SERVER_ERROR).build());
		
	}
	
}